Make sure bot_update compares path with consistent slash endings
Make sure bot_update compares path with consistent slash endings

This came up during testing a recipe for public ios bots.

BUG=none

Review URL: https://codereview.chromium.org/347863002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@278445 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build